Probably could be better titled but I haven't looked at what exactly is going on.
Job: https://jenkins.mono-project.com/job/test-mono-pull-request-i386/30466/
Error: mono_coop_mutex_lock Cannot transition thread 0xf7cae700 from STATE_BLOCKING with DO_BLOCKING
Relevant part of the stack trace: https://gist.github.com/CoffeeFlux/31704a1568f8a230cf6ecef0b17ccefd
From slack:
Aleksey Kliger Oh no - it's allocating (and trying to take a domain lock in the crash reporter)